From 1d439e96f5e8845a79d83f3019e5bae33666b291 Mon Sep 17 00:00:00 2001
From: Paul Masurel <paul.masurel@gmail.com>
Date: Fri, 7 Sep 2018 08:43:44 +0900
Subject: [PATCH] Using sort unstable by key.

---
 src/postings/postings_writer.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/postings/postings_writer.rs b/src/postings/postings_writer.rs
index fe56795e7..d90b322d9 100644
--- a/src/postings/postings_writer.rs
+++ b/src/postings/postings_writer.rs
@@ -98,7 +98,7 @@ impl MultiFieldPostingsWriter {
             .iter()
             .map(|(term_bytes, addr, bucket_id)| (term_bytes, addr, bucket_id as UnorderedTermId))
             .collect();
-        term_offsets.sort_by_key(|&(k, _, _)| k);
+        term_offsets.sort_unstable_by_key(|&(k, _, _)| k);
 
         let mut offsets: Vec<(Field, usize)> = vec![];
         let term_offsets_it = term_offsets